if the corresponding lengths of two triangles are proportional then the triangles are similar.
sas - side-angle-side similarity theorem
If an angle of one triangle is congruent to an angle of second triangle and the lengths of the sides include these angles are proportional then the angles are similar
Angle-Angle similarity Postulate: If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar.
if the corresponding lengths of two triangles are proportional then the triangles are similar.
sas - side-angle-side similarity theorem
If an angle of one triangle is congruent to an angle of second triangle and the lengths of the sides include these angles are proportional then the angles are similar
Angle-Angle similarity Postulate: If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar.
AA similarity postulate example
SSS similarity postulate example
SAS similarity postulate example